/*
 * Copyright (c) 2013. wyouflf (wyouflf@gmail.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.dongfang.net.http.client.multipart.content;

import java.io.IOException;
import java.io.OutputStream;

import com.dongfang.net.http.client.multipart.MIME;

/**
 * Body part that is built using a byte array containing a file.
 * 
 * @since 4.1
 */
public class ByteArrayBody extends AbstractContentBody {

	/**
	 * The contents of the file contained in this part.
	 */
	private final byte[] data;

	/**
	 * The name of the file contained in this part.
	 */
	private final String filename;

	/**
	 * Creates a new ByteArrayBody.
	 * 
	 * @param data
	 *            The contents of the file contained in this part.
	 * @param mimeType
	 *            The mime type of the file contained in this part.
	 * @param filename
	 *            The name of the file contained in this part.
	 */
	public ByteArrayBody(final byte[] data, final String mimeType, final String filename) {
		super(mimeType);
		if (data == null) {
			throw new IllegalArgumentException("byte[] may not be null");
		}
		this.data = data;
		this.filename = filename;
	}

	/**
	 * Creates a new ByteArrayBody.
	 * 
	 * @param data
	 *            The contents of the file contained in this part.
	 * @param filename
	 *            The name of the file contained in this part.
	 */
	public ByteArrayBody(final byte[] data, final String filename) {
		this(data, "application/octet-stream", filename);
	}

	public String getFilename() {
		return filename;
	}

	public void writeTo(final OutputStream out) throws IOException {
		out.write(data);
		callBackInfo.pos += data.length;
		callBackInfo.doCallBack(false);
	}

	public String getCharset() {
		return null;
	}

	public String getTransferEncoding() {
		return MIME.ENC_BINARY;
	}

	public long getContentLength() {
		return data.length;
	}

}
